Improvement in door-buttons



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WILLIAM E. SPARKS, 0F NEW` HAVEN, CONN EC'IIUT, ASSIGNOR-TO SAR n GENT & C0., OF SAME PLACE.

Letters Patent No. 75,996, dated March 24, 1868.

IMPROVEMENT IN DOOR-BUTTONS.

V The Schedule referred to'in these Letters Patent and making; part of Lhe same.

To all whom tt may concern:

This invention relates to au improvement in thatv class ot' faste'nings for dooiscommonly called doorbuttons or turn-buttons, that is to, say,a lever or crossbar attached to a plate, and placed ou the jainb, near the door, andso that when the bar is turned horizontally, the door is secured, and turned vertically, the door may be opened, that is to say, when the button is placed upon a. perpendicular jamb; and

The invention consists in the arrangement of a spring-point, in one end ot' the lever or crossbar, and providing the plate with indentations, so that, at certain positions, thepoint will spring into o-ne of the said indentations, and arrest the turning of the bar at that point, and yet so that an additional force may turn the button still further.

In order to the clear umlerstanding of' my invention, I will proceed to describe the same, as illustrated in the accom panying drawings. y

A is the plate, by which the `button is secured to the jan1b,an|l to the said plate, by a pivot, a, the cross-bar B is fixed, so as to betnrned freely thereon.

In one end, (the shorter, as here represeuted,) I arrange a point, el, pressed downward by asp'i|1g,as denoted iu iig. 3, and in the circle described by said point, tui-niner on a pivot, I form iudentations in the plate A, 4at such points as I desire, to arrest the turning ofthe button, here represented as when the button is horizontal, as in tig. l, and when vertical, as in. red or blue, according,r as the lever is turned up or down, the indentation denoted in section in rig. 3, when the lever is in a horizontal posit-ion.

These indentations are concave or conical, so that suiiicient force being `applied, the button may be "turned, and the form ofthe indentation force the bolt up as the lever passes therefrom, but the strength' of the spring,r and the indentation of the plate are such that the button cannot easily be turned from the p0` sit-ion ofthe ndeutatious.

I employ the usual keeper-plate C, for attachment 

